Cutaneous arteriovenous malformations (AVM) are post-flow malformations. They consist of a connection between arteries and veins. The can be congenital or acquired. The lesions may be small to large and aggressive.

There are many particular clinical forms

- Stewart-Fluefarb

- Bonnet-Blanc Deschaumes (or Wyrburn – Mason)

- Capillary malformations –AVM syndrome with RASA-1 mutation

- Parkes-Weber syndrome

- Congenital lipomatous overgrowth vascular malformations and epidermal nevi (CLOVE) syndrome

- Cobb syndrome AVM can be complicated by pain, ulceration, haemorrhage and necrosis. Evolution has 4 stages (Schobringer classification).

Diagnosis is based particulary on two exams, doppler ultrasonography and MRI.

Treatment for voluminous forms used embolization, surgery, and new medicals treatments with some anti VEGF drugs.